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<!--Converted with LaTeX2HTML
original version by:  Nikos Drakos, CBLU, University of Leeds
* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan
* with significant contributions from:
  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<!-- l2h_begin tex_l2h 1 -->

<P>
<BR><P></P>
<DIV ALIGN="CENTER" CLASS="mathdisplay">
<!-- MATH
 \begin{displaymath}
\chi^2 = \sum_{i=1}^N
          \left(y_i - (a + b x_i)
	  \over \sigma_i\right)^2
\end{displaymath}
 -->

<IMG
 WIDTH="100" HEIGHT="50" BORDER="0"
 SRC="tex_l2h_img1.png"
 ALT="\begin{displaymath}\chi^2 = \sum_{i=1}^N
\left(y_i - (a + b x_i)
\over \sigma_i\right)^2 \end{displaymath}">
</DIV>
<BR CLEAR="ALL">
<P></P>

<!-- l2h_end tex_l2h 1 -->

<!-- l2h_begin tex_l2h 2 -->

<P>
tex <SPAN CLASS="logo-TeX">T<SMALL>E</SMALL>X</SPAN>
<!-- l2h_end tex_l2h 2 -->

<!-- l2h_begin tex_l2h 3 -->
<!-- MATH
 ${x^i}\over{\tan y}$
 -->
<SPAN CLASS="MATH"><IMG
 WIDTH="100" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
 SRC="tex_l2h_img2.png"
 ALT="${x^i}\over{\tan y}$"></SPAN>

<!-- l2h_end tex_l2h 3 -->

<!-- l2h_begin tex_l2h 4 -->
<SPAN CLASS="MATH"><IMG
 WIDTH="100" HEIGHT="10" ALIGN="BOTTOM" BORDER="0"
 SRC="tex_l2h_img3.png"
 ALT="$a @\ b$"></SPAN>

<!-- l2h_end tex_l2h 4 -->

<!-- l2h_begin tex_l2h 5 -->
<!-- MATH
 $@code{math code} a < b$
 -->
<SPAN CLASS="MATH"><IMG
 WIDTH="100" HEIGHT="20" ALIGN="MIDDLE" BORDER="0"
 SRC="tex_l2h_img4.png"
 ALT="$@code{math code} a &lt; b$"></SPAN>

<!-- l2h_end tex_l2h 5 -->

<!-- l2h_begin tex_l2h 6 -->
<!-- MATH
 $\underline{@code{math \hbox{ code }}} \sum_{i}{\underline{f}}$
 -->
<SPAN CLASS="MATH"><IMG
 WIDTH="100" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
 SRC="tex_l2h_img5.png"
 ALT="$ \underline{@code{math \hbox{ code }}} \sum_{i}{\underline{f}}$"></SPAN>

<!-- l2h_end tex_l2h 6 -->
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